The alkali metals have relatively low melting point. Which one of the following alkali metals is expected to have the highest melting point?

Asked in UPSC NDA 2 2015 · Topic: Metals, Minerals, Ores: Properties, Uses (Physical properties of metals (luster, malleability, ductility, conductivity, density, melting/boiling points))

1. Li
2. Na
3. K
4. Rb

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